我该如何解决这个 "NameError"？

Question

def Get_Details():
    Student_Name = input("Enter the name of the student: ")
    Coursework_Mark = int(input("Enter the coursework mark achieved by the student: "))
    while Coursework_Mark < 0 or Coursework_Mark >60:
        print("Try again, remember the coursework mark is out of 60.")
        Coursework_Mark = int(input("Enter the coursework mark achieved by the student: "))

    Prelim_Mark = int(input("Enter the prelim mark achieved by the student: "))
    while Prelim_Mark < 0 or Prelim_Mark > 90:
        print("Try again, remember the prelim mark is out of 90.")
        Prelim_Mark = int(input("Enter the prelim mark achieved by the student: "))

    return Student_Name, Coursework_Mark, Prelim_Mark

def Calculate_Percentage(Coursework_Mark, Prelim_Mark):

    Percentage = ((Coursework_Mark + Prelim_Mark)/150) * 100

    if Percentage >= 70:
        Grade = "A"
    elif 60 >= Percentage <= 69:
        Grade = "B"
    elif 50 >= Percentage <= 59:
        Grade = "C"
    elif 45 >= Percentage <= 50:
        Grade = "D"
    else:
        Grade = "No Award"

    return Percentage, Grade


def Display_Results(Student_Name, Grade):
    print(Student_Name + " achieved a grade " + str(Grade) + ".")

#MAIN PROGRAM
Student_Name, Coursework_Mark, Prelim_Mark = Get_Details()
Percentage = Calculate_Percentage(Coursework_Mark, Prelim_Mark)
Display_Results(Student_Name, Grade)

在程序结束时我收到：

Program.py", line 41, in <module>
    Display_Results(Student_Name, Grade)
NameError: name 'Grade' is not defined

如何解决这个问题？请帮忙，谢谢。

该程序询问用户他们的姓名、课程作业分数（满分 60 分）和初步分数（满分 90 分）并计算他们的百分比，并将其作为成绩连同他们的名字。

Answer 1

函数 Calculate_Percentage returns 两个值，百分比和等级。看起来您想将它们分配给一个单独的变量，就像您对上面一行中 Get_Details 调用中的三个值所做的那样。

所以最后两行应该是这样的：

Percentage, Grade = Calculate_Percentage(Coursework_Mark, Prelim_Mark)
Display_Results(Student_Name, Grade)

请使用 Pythonic 命名约定，使您的代码更具可读性。例如变量名通常是 all_lower_case.

我该如何解决这个 "NameError"？

How do I sort out this "NameError"?

python-3.x

python-3.3

nameerror